CN202708128U - Stop valve - Google Patents

Stop valve Download PDF

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Publication number
CN202708128U
CN202708128U CN 201220326776 CN201220326776U CN202708128U CN 202708128 U CN202708128 U CN 202708128U CN 201220326776 CN201220326776 CN 201220326776 CN 201220326776 U CN201220326776 U CN 201220326776U CN 202708128 U CN202708128 U CN 202708128U
Authority
CN
China
Prior art keywords
valve
gap
valve rod
stop
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220326776
Other languages
Chinese (zh)
Inventor
江炜
张群
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FUJIAN GENERAL VALVE Co Ltd
Original Assignee
FUJIAN GENERAL VALVE Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FUJIAN GENERAL VALVE Co Ltd filed Critical FUJIAN GENERAL VALVE Co Ltd
Priority to CN 201220326776 priority Critical patent/CN202708128U/en
Application granted granted Critical
Publication of CN202708128U publication Critical patent/CN202708128U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a stop valve and belongs to the technical field of valves. The stop valve comprises a valve body, a valve clack, a bonnet, a valve rod and a hand wheel. The valve clack is matched with an internal flow passage gap, the valve rod penetrates through a guide hole of the bonnet and is connected with the hand wheel, a sealing gland is fixedly mounted on the bonnet, the valve rod penetrates through a sealing gland, a cavity among the bonnet, the sealing gland and the valve rod forms a sealing chamber, and sealing elements are arranged in the sealing chamber. According to the stop valve, the technical problem that the sealing effect between the valve rod and the bonnet is poor is solved, and the stop valve is widely applied in the valve manufacturing industry.

Description

Stop valve
Technical field
The utility model relates to valve technology field, is specially a kind of stop valve.
Background technique
Stop valve is because its fluid resistance is little, simple in structure, closely the advantage such as reliable is widely used in fields such as vacuum pumping systems, yet the stop valve of conventional construction exists following defective: 1, valve rod easily is corroded, and causes reduce the working life of valve; 2, the sealing effect between valve rod and the valve gap is bad, the problem of Leakage Gas easily occurs; 3, the sealing effect of conventional seals element is not bery desirable, so that the sealability of valve is affected.
The model utility content
Technical problem to be solved in the utility model is: provide a kind of stop valve, to solve the bad technical problem of sealing effect between valve rod and the valve gap.
For solving the problems of the technologies described above, the technical solution of the utility model is: stop valve, comprise valve body, flap, valve gap, valve rod and handwheel, described flap matches with the inner flow passage gap of valve body, described valve rod passes the guide hole of described valve gap and is connected with described handwheel, is installed with sealing gland on the described valve gap, and described valve rod passes described sealing gland, cavity between described valve gap, sealing gland and the valve rod forms closed chamber, is provided with seal element in the described closed chamber.
As a kind of improvement, described seal element is expanded graphite packing.
As a kind of improvement, be provided with the expanded graphite pad between described valve gap and the valve body.
As a kind of improvement, described stem surface is provided with anticorrosion nitride layer.
The utility model is owing to having adopted above structure, has following beneficial effect: because the cavity between valve gap, sealing gland and the valve rod is provided with seal element, sealing effect is good, has strengthened the sealing effect between valve rod and the valve gap, has improved the usability of stop valve.
Because seal element is expanded graphite packing, compares with traditional rubber or asbestos seal element, isolated vacuum is effective, long service life.
Owing to being provided with the expanded graphite pad between valve gap and the valve body, strengthened the sealing effect between valve body and the valve gap, further improved the sealability of stop valve.
Because stem surface is provided with anticorrosion nitride layer, so that valve rod has good corrosion resistance, scrape resistence and wear resistance have prolonged working life of valve rod.
Description of drawings
Accompanying drawing is structural representation of the present utility model;
Among the figure: 1, valve body, 2, flap, 3, valve gap, 4, valve rod, 5, handwheel, 6, seal element, 7, sealing gland, 8, the expanded graphite pad.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in drawings, stop valve, comprise valve body 1, flap 2, valve gap 3, valve rod 4 and handwheel 5, flap 2 matches with the inner flow passage gap of valve body 1, valve rod 4 passes the guide hole of valve gap 3 and is connected with handwheel 5, be installed with sealing gland 7 on the valve gap 3, valve rod 4 passes sealing gland 7, valve gap 3, cavity between sealing gland 7 and the valve rod 4 forms closed chamber, is provided with seal element 6 in the closed chamber, and seal element 6 is expanded graphite packing, sealing effect is good, isolated vacuum is effective, has strengthened the sealing effect between valve rod 4 and the valve gap 3, has improved the usability of stop valve.Be provided with expanded graphite pad 8 between valve gap 3 and the valve body 1, strengthened the sealing effect between valve body 1 and the valve gap 3.
Valve rod 4 surfaces are provided with anticorrosion nitride layer, so that valve rod 4 has good corrosion resistance, scrape resistence and wear resistance have prolonged working life of valve rod 4.
The utility model is not limited to above-mentioned concrete mode of execution, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the present utility model.

Claims (4)

1. stop valve, comprise valve body, flap, valve gap, valve rod and handwheel, described flap matches with the inner flow passage gap of valve body, described valve rod passes the guide hole of described valve gap and is connected with described handwheel, it is characterized in that: be installed with sealing gland on the described valve gap, described valve rod passes described sealing gland, and the cavity between described valve gap, sealing gland and the valve rod forms closed chamber, is provided with seal element in the described closed chamber.
2. stop valve according to claim 1, it is characterized in that: described seal element is expanded graphite packing.
3. stop valve according to claim 1 is characterized in that: be provided with the expanded graphite pad between described valve gap and the valve body.
4. stop valve according to claim 1, it is characterized in that: described stem surface is provided with anticorrosion nitride layer.
CN 201220326776 2012-07-08 2012-07-08 Stop valve Expired - Fee Related CN202708128U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220326776 CN202708128U (en) 2012-07-08 2012-07-08 Stop valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220326776 CN202708128U (en) 2012-07-08 2012-07-08 Stop valve

Publications (1)

Publication Number Publication Date
CN202708128U true CN202708128U (en) 2013-01-30

Family

ID=47588434

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220326776 Expired - Fee Related CN202708128U (en) 2012-07-08 2012-07-08 Stop valve

Country Status (1)

Country Link
CN (1) CN202708128U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103335123A (en) * 2013-07-05 2013-10-02 昆山维萨阀门有限公司 General stop valve
CN103899768A (en) * 2014-03-05 2014-07-02 大丰市奥凯流体机械有限公司 Pressure self-sealing stop valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103335123A (en) * 2013-07-05 2013-10-02 昆山维萨阀门有限公司 General stop valve
CN103899768A (en) * 2014-03-05 2014-07-02 大丰市奥凯流体机械有限公司 Pressure self-sealing stop valve

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130130

Termination date: 20150708

EXPY Termination of patent right or utility model